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fix math functions

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This commit is contained in:
bolero-MURAKAMI 2013-05-06 00:22:08 +09:00
parent fccb16687b
commit 7794e56192
27 changed files with 342 additions and 102 deletions
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18
sprout/math/lgamma.hpp
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@ -7,11 +7,13 @@
#include <sprout/math/detail/config.hpp>
#include <sprout/math/detail/float_compute.hpp>
#include <sprout/math/constants.hpp>
#include <sprout/math/isnan.hpp>
#include <sprout/math/factorial.hpp>
#include <sprout/math/log.hpp>
#include <sprout/math/sin.hpp>
#include <sprout/math/fabs.hpp>
#include <sprout/math/itrunc.hpp>
#include <sprout/math/is_integer.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
@ -181,13 +183,17 @@ namespace sprout {
>
inline SPROUT_CONSTEXPR FloatType
lgamma(FloatType x) {
typedef typename sprout::math::detail::float_compute<FloatType>::type type;
return x == 1 ? FloatType(0)
: x == 2 ? FloatType(0)
: x <= 0 && x == std::trunc(x) ? std::numeric_limits<FloatType>::infinity()
return sprout::math::isnan(x) ? x
: x <= 0 && sprout::math::is_integer(x) ? std::numeric_limits<FloatType>::infinity()
: x == -std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
: x == std::numeric_limits<FloatType>::infinity() ? std::numeric_limits<FloatType>::infinity()
: static_cast<FloatType>(sprout::math::detail::lgamma_impl(static_cast<type>(x)))
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
: std::lgamma(x)
#else
: x == 1 ? FloatType(0)
: x == 2 ? FloatType(0)
: static_cast<FloatType>(sprout::math::detail::lgamma_impl(static_cast<typename sprout::math::detail::float_compute<FloatType>::type>(x)))
#endif
;
}
@ -201,7 +207,7 @@ namespace sprout {
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::lgamma;
using sprout::math::detail::lgamma;
} // namespace math
using sprout::math::lgamma;